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@beesandbombs
Created August 23, 2018 11:56
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sphere lights
int[][] result;
float t, c;
float ease(float p) {
return 3*p*p - 2*p*p*p;
}
float ease(float p, float g) {
if (p < 0.5)
return 0.5 * pow(2*p, g);
else
return 1 - 0.5 * pow(2*(1 - p), g);
}
float mn = .5*sqrt(3), ia = atan(sqrt(.5));
void push() {
pushMatrix();
pushStyle();
}
void pop() {
popStyle();
popMatrix();
}
float c01(float g) {
return constrain(g, 0, 1);
}
void draw() {
if (!recording) {
t = mouseX*1.0/width;
c = mouseY*1.0/height;
if (mousePressed)
println(c);
draw_();
} else {
for (int i=0; i<width*height; i++)
for (int a=0; a<3; a++)
result[i][a] = 0;
c = 0;
for (int sa=0; sa<samplesPerFrame; sa++) {
t = map(frameCount-1 + sa*shutterAngle/samplesPerFrame, 0, numFrames, 0, 1);
draw_();
loadPixels();
for (int i=0; i<pixels.length; i++) {
result[i][0] += pixels[i] >> 16 & 0xff;
result[i][1] += pixels[i] >> 8 & 0xff;
result[i][2] += pixels[i] & 0xff;
}
}
loadPixels();
for (int i=0; i<pixels.length; i++)
pixels[i] = 0xff << 24 |
int(result[i][0]*1.0/samplesPerFrame) << 16 |
int(result[i][1]*1.0/samplesPerFrame) << 8 |
int(result[i][2]*1.0/samplesPerFrame);
updatePixels();
saveFrame("f###.gif");
if (frameCount==numFrames)
exit();
}
}
//////////////////////////////////////////////////////////////////////////////
int samplesPerFrame = 4;
int numFrames = 280;
float shutterAngle = .5;
boolean recording = false;
void setup() {
size(720, 720, P3D);
pixelDensity(recording ? 1 : 2);
smooth(8);
result = new int[width*height][3];
rectMode(CENTER);
fill(32);
noStroke();
sphereDetail(8);
}
float x, y, z, tt, r = 240;
float X, Y, Z, R;
int N = 400;
float age;
float rotSpeed;
float x_, y_, z_;
void light() {
rotSpeed = random(-1, -.2);
X = randomGaussian();
Y = randomGaussian();
Z = randomGaussian();
R = dist(0, 0, 0, X, Y, Z);
x_ = X*r/R;
y_ = Y*r/R;
z_ = Z*r/R;
age = (t + 1000 - .0016*y + randomGaussian()*.18) % 1;
age = c01(1.5*age);
x = x_*cos(rotSpeed*age) + z_*sin(rotSpeed*age);
y = y_;
z = z_*cos(rotSpeed*age) - x_*sin(rotSpeed*age);
push();
translate(x, y, z);
fill(map(cos(TWO_PI*age), 1, -1, 0, map(modelZ(x, y, z), -r, r, 100, 255)));
sphere(map(cos(TWO_PI*age), 1, -1, 0, 3.5));
pop();
}
void draw_() {
background(0);
push();
translate(width/2, height/2);
randomSeed(1);
for (int i=0; i<N; i++)
light();
pop();
}
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